package lab02.test36;

/**
 * 本科生
 * Created by mac on 2017/11/9.
 */
public class Undergraduate extends Student {


    @Override
    String calGrade() {

        //成绩等级
        String grade = "";
        double avg = average();

        if (avg >= 80&&avg <=100)
            grade = "优秀";
        else if (avg >= 70&&avg <=80)
            grade = "良好";
        else if (avg >= 60&&avg <=70)
            grade = "一般";
        else  if (avg >= 50&&avg <=60)
            grade = "及格";
        else
            grade = "不及格";

        return grade;
    }
}
